16x20x4 (3 5/8) Pleated MERV 12 Air Filters 2 Pack Master Controller Tappin' Roots All Stages is

Tappin' Roots All Stages is a 100% natural nutrient that triggers fast growth in all plants at any stage of development

as the pH varies (up to a high of 8

Li-ion batteries can handle only 800 to 1

Digital display features a clock

16x20x4 (3 5/8) Pleated MERV 12 Air Filters 2 Pack Master Controller Tappin' Roots All Stages isImportant Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. If you are replacing a 4 3 8 depth 16x20x4 filter